| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALBANIA | Accession | 15/11/2001 | 15/11/2001 |
| AUSTRIA | Definitive Signature | 26/04/1954 | |
| AZERBAIJAN | Accession | 07/10/1998 | 07/10/1998 |
| BELARUS | Accession | 21/03/1997 | |
| BELGIUM | Signature | 17/10/1953 | |
| BELGIUM | Ratification | 17/11/1953 | |
| Berlin West | Extension | 12/03/1973 | 31/12/1953 |
| BOSNIA AND HERZEGOVINA | Accession | 22/03/1994 | 22/03/1994 |
| BULGARIA | Accession | 08/06/1994 | 08/06/1994 |
| CZECH REPUBLIC | Accession | 06/07/1993 | 06/07/1993 |
| DENMARK | Signature | 17/10/1953 | |
| DENMARK | Ratification | 13/07/1954 | |
| ESTONIA | Accession | 02/04/1993 | 02/04/1993 |
| FINLAND | Accession | 01/12/1976 | |
| FRANCE | Definitive Signature | 17/10/1953 | |
| GEORGIA | Accession | 03/08/2000 | 03/08/2000 |
| GERMANY FEDERAL REPUBLIC | Definitive Signature | 17/10/1953 | |
| GREECE | Signature | 05/04/1954 | |
| GREECE | Ratification | 03/08/1955 | |
| HUNGARY | Accession | 03/12/1992 | 03/12/1992 |
| ICELAND | Accession | 20/08/1998 | 20/08/1998 |
| IRELAND, REPUBLIC OF | Accession | 22/01/1963 | |
| ITALY | Definitive Signature | 17/10/1953 | |
| LATVIA | Accession | 24/05/2000 | 24/05/2000 |
| LIECHTENSTEIN | Accession | 08/03/2000 | 08/03/2000 |
| LITHUANIA | Accession | 27/12/1994 | |
| LUXEMBOURG | Signature | 17/10/1953 | |
| LUXEMBOURG | Ratification | 26/02/1955 | |
| MACEDONIA THE FYR OF | Accession | 26/02/1997 | 26/02/1997 |
| MALTA | Accession | 16/07/2002 | 16/07/2002 |
| MOLDOVA REPUBLIC OF | Accession | 30/08/1996 | 30/08/1996 |
| MONTENEGRO | Accession | 17/10/2006 | 17/10/2006 |
| NETHERLANDS THE | Signature | 17/10/1953 | |
| NETHERLANDS THE | Ratification | 09/03/1954 | |
| NORWAY | Signature | 17/10/1953 | |
| NORWAY | Ratification | 13/07/1954 | |
| POLAND | Accession | 30/06/1993 | 30/06/1993 |
| PORTUGAL | Signature | 17/10/1953 | |
| PORTUGAL | Ratification | 24/07/1954 | |
| ROMANIA | Accession | 25/11/1993 | 25/11/1993 |
| RUSSIAN FEDERATION | Accession | 17/05/1999 | 17/05/1999 |
| SLOVAK REPUBLIC | Accession | 16/02/1994 | 16/02/1994 |
| SPAIN | Signature | 17/10/1953 | |
| SPAIN | Ratification | 13/01/1954 | |
| SPAIN | Reservation | 13/01/1954 | |
| SWEDEN | Signature | 17/10/1953 | |
| SWEDEN | Ratification | 08/01/1954 | |
| SWITZERLAND | Definitive Signature | 17/10/1953 | |
| TRIESTE UK-US ZONE | Signature | 17/10/1953 | |
| TRIESTE UK-US ZONE | Ratification | 31/12/1953 | |
| TURKEY | Signature | 17/10/1953 | |
| TURKEY | Ratification | 10/05/1954 | |
| UKRAINE | Accession | 05/02/2002 | |
| UNITED KINGDOM | Signature | 17/10/1953 | |
| UNITED KINGDOM | Ratification | 01/03/1954 | |
| YUGOSLAVIA | Accession | 02/09/1955 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Accession | 18/07/2002 | 18/07/2002 |